The bodies of Amazon rainforest activist Joao Claudio Ribeiro da Silva and his wife Maria do Espirito Santo are carried to burial by friends and relatives, in the municipal cemetery of Maraba, in Brazil, on May 26, 2011. The identity of those responsible for the shooting in northern Brazil on Tuesday has not yet been determined, but da Silva predicted his own death six months ago, and was the recipient of frequent death threats by illegal loggers and cattle ranchers.

"I will protect the forest at all costs. That is why I could get a bullet in my head at any moment -- because I denounce the loggers and charcoal producers," he said.

Watch his speech at TEDxAmazonia, below, in which he says he believes killing trees in the rainforest is murder (click the "cc" button in the player for English subtitles).

The bodies of Amazon rainforest activist Joao Claudio Ribeiro da Silva and his wife Maria do Espirito Santo are carried to burial by friends and relatives, in the municipal cemetery of Maraba, in Brazil, on May 26, 2011. The identity of those responsible for the shooting in northern Brazil on Tuesday has not yet been determined, but da Silva predicted his own death six months ago, and was the recipient of frequent death threats by illegal loggers and cattle ranchers.

"I will protect the forest at all costs. That is why I could get a bullet in my head at any moment -- because I denounce the loggers and charcoal producers," he said.

Watch his speech at TEDxAmazonia, below, in which he says he believes killing trees in the rainforest is murder (click the "cc" button in the player for English subtitles).